Spell Focus, Variant (3.5e Feat)
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Spell Focus [General]
Choose a school of magic (such as illusion) or a spell descriptor (such as mind effecting or fire).
Benefit: Spells you cast from the chosen school or with the chosen descriptor either gain a +1 DC to their saving throws or +1 caster level. This bonus is chosen when you take this feat and cannot be changed afterwards.
Special: You can gain this feat multiple times. Each time you do, it applies to a different school or spell descriptor. You may therefore not gain both effects from this feat for the same school or descriptor.